Basic Study
Copyright ©The Author(s) 2021.
World J Transplant. Jun 18, 2021; 11(6): 231-243
Published online Jun 18, 2021. doi: 10.5500/wjt.v11.i6.231
Table 1 Variations of the right hepatic vein at the hepatocaval junction according to the classification of Nakamura and Tsuzuki[4]
Type
Description
Trinidad and Tobago (%)
India[16] (%)
Japan[4] (%)
China[17]1 (%)
Turkey[18]1 (%)
Slovenia[6] (%)
France[19] (%)
Vietnam[39] (%)
CTCadaverCadaverCTCTCadaverCadaverCadaver
INo tributaries within 1cm of the IVC83/118 (70.3)82/100 (82)51/83 (61.4)162/200 (85)40/100 (40)85/110 (77.3)32/64 (50)18/20 (90)
IIOne tributary within 1 cm of IVC; IIa: Right superior vein; IIb: Right antero-superior vein24/118 (20.3)10/100 (10)19/83 (22.8)17/200 (8.5)57/100 (57)NS20/64 (31.3)0
IIIBoth right superior and right antero-superior veins join within 1cm of IVC6/118 (5.1)4/100 (4)8/83 (9.6)6/200 (3)3/100 (3)NS10/64 (15.6)0
IVTwo veins empty directly into IVC: (1) Right hepatic with a branch of right antero-superior vein; and (2) Independent right superior vein5/118 (4.2)4/100 (4)5/83 (6)15/200 (7.5)0NS2/64 (3.1)2/20 (10)
Table 2 Prevalence of accessory right hepatic veins in selected countries
Country
Methodology
None (SRHV only) (%)
MRHV (%)
IRHV (%)
Trinidad and TobagoImaging (CT)60/118 (51)5/118 (4)53/118 (45)
Global prevalence3343/4657 (71.8)145/2652 (5.5)1361/4657 (29.2)
P value< 0.00010.5620.0002
Poland[21]: 1975Cadaveric79/93 (84.9)NS14/93 (15.1)
France[22]: 1978Cadaveric62/80 (77.5)NA18/80 (22.5)
Japan[4]: 19811Cadaveric32/83 (38.6)20/83 (24.1)31/83 (37.3)
France[23]: 1981Cadaveric79/100 (79)NS21/100 (21)
Japan[24]: 1983Ultrasound (operative)242/269 (90)2/269 (0.7)27/269 (10)
Korea[25]: 1987Ultrasound67/124 (54)NA57/124 (46)
France[19]: 19881Cadaveric32/64 (50)11/64 (17.2)28/64 (43.8)
England[26]: 1990Imaging (MRI)63/82 (76.8)019/82 (23.2)
France[27]: 1993Cadaveric111/125 (88.8)NA14/125 (11.2)
United States[28]: 1995Imaging (CT)62/69 (89.9)1/69 (1.5)6/69 (8.7)
Taiwan[29]: 1997Imaging (US)306/400 (76.5)22/400 (5.5)72/400 (18)
Slovenia[6]: 2000Cadaveric79/110 (71.8)8/110 (7.3)31/110 (28.2)
Central India[16]: 2001cadaveric96/100 (96)04/100 (4)
Turkey[18]: 20041Imaging (CT) 53/100 (53)19/100 (19)28/100 (28)
Turkey[30]: 2004Imaging (CT)243/308 (78.9)NA65/308 (21.1)
United States[31]: 2004Imaging (CT)40/65 (61.5)025/65 (38.5)
Turkey[32]: 2005Imaging (CT)27/52 (51.9)025/52 (48.1)
Germany[33]: 2005Imaging (CT)30/55 (54.5)NA25/55 (45.5)
Turkey[8]: 2007Imaging (CT)764/1120 (68.2)NA356/1120 (31.8)
Japan[34], 20081Cadaveric0/6018/60 (30)52/60 (86.7)
Scotland[35]: 20101Cadaveric0/182/18 (11.1) 16/18 (88.9)
South China[17]: 2012Imaging (CT)158/200 (79)042/200 (21)
Japan[2]: 2016Imaging (CT)46/100 (46)20/100 (20)34/100 (34)
South Korea[36]: 2017Imaging (CT)196/360 (54.4)22/360 (6.1)164/360 (45.6)
Northern India[37]: 2019Imaging (CT)458/500 (91.6)0185/500 (37)
Vietnam[39]: 2020Cadaveric18/20 (90)02/20 (10)